Control system and control method

Abstract

The present invention obtains a control system and a control method capable of appropriately suppressing front lift-up of a straddle-type vehicle.In the control system and the control method according to the present invention, damping forces of suspensions and drive power generated to the straddle-type vehicle are controlled. The drive power adjustment control is executed to adjust the drive power generated to the straddle-type vehicle so as to suppress the front lift-up that causes a front wheel of the straddle-type vehicle to lift off from the ground, and initiation timing of the drive power adjustment control is controlled by using a physical quantity to which states of the suspensions are reflected.

The invention claimed is: 
     
       1. A control system ( 90 ) for controlling behavior of a straddle-type vehicle ( 100 ) that includes suspensions ( 5 ,  6 ), the control system comprising:
 a control section ( 92 ) that controls damping forces of the suspensions ( 5 ,  6 ) and drive power generated to the straddle-type vehicle ( 100 ), wherein 
 the control section ( 92 )
 in response to determining that a possibility of occurrence of front lift-up that causes a front wheel ( 3 ) of the straddle-type vehicle ( 100 ) to lift off from the ground is higher than a reference, execute damping force adjustment control for adjusting damping forces of the suspensions ( 5 ,  6 ) so as to suppress the front lift-up, 
 after executing damping force adjustment control, initiate drive power adjustment control for adjusting the drive power generated to the straddle-type vehicle ( 100 ) so as to suppress the front lift-up, and 
 controls initiation timing of the drive power adjustment control by using a measured characteristic of the suspensions ( 5 ,  6 ). 
 
 
     
     
       2. The control system according to  claim 1 , wherein
 the control section ( 92 )
 determines a possibility of occurrence of the front lift-up on the basis of the measured characteristic, and 
 initiates the drive power adjustment control when determining that the possibility of the occurrence of the front lift-up is higher than the reference. 
 
 
     
     
       3. The control system according to  claim 1 , wherein
 the control section ( 92 )
 determines whether the front lift-up currently occurs on the basis of the measured characteristic, and 
 initiates the drive power adjustment control when determining that the front lift-up currently occurs. 
 
 
     
     
       4. The control system according to  claim 2 , wherein
 the control section ( 92 )
 determines the possibility of the occurrence of the front lift-up on the basis of the measured characteristic, and 
 executes damping force adjustment control when determining that the possibility of the occurrence of the front lift-up is higher than the reference. 
 
 
     
     
       5. The control system according to  claim 1 , wherein the control section ( 92 ) controls termination timing of the drive power adjustment control by using the measured characteristic. 
     
     
       6. The control system according to  claim 5 , wherein
 the control section ( 92 )
 determines the possibility of the occurrence of the front lift-up on the basis of the measured characteristic, and 
 terminates the drive power adjustment control when determining that the possibility of the occurrence of the front lift-up is lower than the reference. 
 
 
     
     
       7. The control system according to  claim 5 , wherein
 the control section ( 92 )
 determines whether the front lift-up currently occurs on the basis of the measured characteristic, and 
 terminates the drive power adjustment control when determining that the front lift-up does not currently occur. 
 
 
     
     
       8. The control system according to  claim 1 , wherein the control section ( 92 ) controls a degree of a change in the drive power in the drive power adjustment control by using the measured characteristic. 
     
     
       9. The control system according to  claim 1 , wherein stroke amounts of the suspensions ( 5 ,  6 ) are reflected to the measured characteristic. 
     
     
       10. The control system according to  claim 9 , wherein the measured characteristic is a position of a center of gravity of the straddle-type vehicle ( 100 ). 
     
     
       11. The control system according to  claim 1 , wherein in the drive power adjustment control, the control section ( 92 ) reduces the drive power generated to the straddle-type vehicle ( 100 ) to be lower than the drive power before the initiation of the drive power adjustment control. 
     
     
       12. The control system according to  claim 1 , wherein in the drive power adjustment control, the control section ( 92 ) maintains the drive power generated to the straddle-type vehicle ( 100 ) to a lower value than reference drive power. 
     
     
       13. A control method for controlling behavior of a straddle-type vehicle ( 100 ) that includes suspensions ( 5 ,  6 ), and
 damping forces of the suspensions ( 5 ,  6 ) and drive power generated to the straddle-type vehicle ( 100 ) being controlled by a control system ( 90 ), the control method comprising: 
 in response to determining that a possibility of occurrence of front lift-up that causes a front wheel ( 3 ) of the straddle-type vehicle ( 100 ) to lift off from the ground is higher than a reference, executing damping force adjustment control for adjusting damping forces of the suspensions ( 5 ,  6 ) so as to suppress the front lift-up; 
 after executing damping force adjustment control, executing drive power adjustment control for adjusting the drive power generated to the straddle-type vehicle ( 100 ) so as to suppress front lift-up; and 
 adjusting initiation timing of the drive power adjustment control by using a measured characteristic of the suspensions ( 5 ,  6 ).